diff --git a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php
index cee4b1d2883fa..755566f45bdfa 100644
--- a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php
+++ b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php
@@ -1671,7 +1671,7 @@ private function registerCacheConfiguration(array $config, ContainerBuilder $con
             }
 
             if ($pool['tags']) {
-                if ($config['pools'][$pool['tags']]['tags'] ?? false) {
+                if (true !== $pool['tags'] && ($config['pools'][$pool['tags']]['tags'] ?? false)) {
                     $pool['tags'] = '.'.$pool['tags'].'.inner';
                 }
                 $container->register($name, TagAwareAdapter::class)